I have tried restarting holding the Apple key and R - Nothing. I have also tried holding the ALT key on bootup but it just gives me an arrow curser and nothing else.

I am not sure if the hard drive is even bootable. I do not have a OS Disc. I have downloaded a DMG file off the internet to my Pen Drive. I assumed incorrectly the OS would boot from my Pen Drive - it does not. I have cable internet if needed. I have Windows 7 Ultimate which I can connect to the internet from, and I have an iPad if that would help.

I didn't find the right solution from the Internet.
References:https://discussions.apple.com/thread/5565827?tstart=0

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